Best Electrostatic Furnace Filter with carbon and prefilter layer?

Question

I have horribel allergies and asthma. I'm looking for a permanant electrostatic filter for my furnace that you don't plug in, and has a carbon layer and a "pre-filter" layer.

Answer 1

I will probably catch some flack, but there is no permanent filter that can do this job. Electrostatic filters are charged by static and the amount of charge is not enough to plate particulate matter to the filter media. In effect when the blower shuts down, many of the particles settle to the bottom of the blower, to be recycled again and again. They also do nothing about gaseous material or germs that come from carpets, varnishes, pets, etc.

Check out  the Micro Power Guard or Dyna Filter and consider a UV light installed in your duct system to control mold and odors.